ScrollX format from Bonzai Studio enables you to build the full-screen nonintrusive creative or ad. 

The format stitches itself with the publisher content and appears naturally when a user scrolls down on a web page.

ScrollX

Initially, when the page loads, the publisher content appears. On page scroll, the publisher content slides up to reveal the creative. 

ScrollX's nifty nature helps you to build on the idea of displaying something exciting in the creative which slowly reveals in front of the site visitor in a non-intrusive way.